Gregory Michael Papadopoulos (born 1958) is an American engineer, executive, and venture capitalist.[1] He is the creator and lead proponent for Redshift, a theory on whether technology markets are over or under-served by Moore's Law.

He joined Sun Microsystems in September 1994. After serving as chief scientist for the server division, in December 1995 he became chief technical officer (CTO) of SMCC (Sun's hardware division), and CTO of the entire company in April 1998.[1] He left Sun in February 2010.[4][7][8]

Papadopoulos co-authored (with David Douglas and John Boutelle) the book on Citizen Engineer: A Handbook for Socially Responsible Engineering, published in 2009.[9] At the time he lived in Los Gatos, California.[10]